Inventor · disambiguated record
Wilhelmus P. H. Castricum
Also filed as: CASTRICUM WILHELMUS P · CASTRICUM WILHELMUS P H
18 granted patents·2 pending applications·321 citations·filing 1984–2015
95Inventor score
Files withSPIRO AMERICA INC10LINDAB AB5CASTRICUM WILHELMUS P H2HELIX INTERNATIONAL INC2SPIRAL HELIX INC1
Top patents by PatentIndex Score
20 records- 0190US8578576B2Machine to produce expanded metal spirally lock-seamed tubing from solid coil stockCASTRICUM WILHELMUS P H·Filed 2008·Granted Nov 12, 2013·9 cites·21 claims
- 0289US4706481AApparatus for cutting hollow pipeSPIRO AMERICA INC·Filed 1986·Granted Nov 17, 1987·57 cites·22 claims
- 0381US6295853B1Spirally formed pipe cutter with driving mechanism to actively rotate inner knifeLINDAB AB·Filed 2000·Granted Oct 2, 2001·11 cites·23 claims
- 0480US4823579AApparatus for cutting hollow pipesSPIRO AMERICA INC·Filed 1987·Granted Apr 25, 1989·31 cites·18 claims
- 0578US4924684AApparatus for forming and cutting spiral pipeSPIRO AMERICA INC·Filed 1989·Granted May 15, 1990·31 cites·4 claims
- 0670US8578577B2Machine to produce expanded metal spirally lock-seamed tubing from solid coil stockCASTRICUM WILHELMUS P H·Filed 2008·Granted Nov 12, 2013·2 cites·8 claims
- 0766US4567742ARibbed spiral pipe producing machineSPIRO AMERICA INC·Filed 1984·Granted Feb 4, 1986·20 cites·15 claims
- 0865US5860305APipe cutter with dual outer cutting knives and methodLINDAB AB·Filed 1997·Granted Jan 19, 1999·12 cites·21 claims
- 0964US5257521AApparatus and method for cutting spiral pipeSPIRO AMERICA INC·Filed 1992·Granted Nov 2, 1993·21 cites·25 claims
- 1064US4711110AApparatus for crimping pipeSPIRO AMERICA INC·Filed 1986·Granted Dec 8, 1987·16 cites·20 claims
- 1162US5421185AApparatus for cutting sheet material into curved segmentsSPIRO AMERICA INC·Filed 1993·Granted Jun 6, 1995·18 cites·25 claims
- 1259US5636541AApparatus for forming and cutting spiral pipeLINDAB AB·Filed 1995·Granted Jun 10, 1997·10 cites·19 claims
- 1358US5105639AApparatus for forming spiral pipeSPIRO AMERICA INC·Filed 1990·Granted Apr 21, 1992·17 cites·21 claims
- 1457US6192726B1System and method for corrugating spiral formed pipeLINDAB AB·Filed 1999·Granted Feb 27, 2001·9 cites·18 claims
- 1557US5193374AApparatus for cutting spiral pipeSPIRO AMERICA INC·Filed 1991·Granted Mar 16, 1993·18 cites·18 claims
- 1651US5609055AMethod and apparatus for cutting and notching a hollow pipeSPIRAL HELIX INC·Filed 1995·Granted Mar 11, 1997·17 cites·23 claims
- 1751US5020351AApparatus for flattening irregular circumferential surfaces in spirally formed pipeSPIRO AMERICA INC·Filed 1990·Granted Jun 4, 1991·14 cites·14 claims
- 1841US5992275APipe cutter having non-rotating, overlapping knivesLINDAB AB·Filed 1997·Granted Nov 30, 1999·8 cites·20 claims
- 1940US2003230127A1Perforated spiral pipeHELIX INTERNATIONAL INC·Filed 2002·Application pending·0 cites
- 2039US2016074921A1Machine to produce perforated metal stockHELIX INTERNATIONAL INC·Filed 2015·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →